Promethium
Symbol:
Pm
Atomic Number: 61
Atomic Weight: 145 (most stable)
Boiling Point: 3273 K
Melting Point: 1315 K
Density at 300K: 7.22 g/cm
3
Covalent radius: 1.63
Atomic radius: 2.62
Atomic
volume: 22.4 cm
3/mol
First
ionization potental: 5.55 V
Specific heat capacity: N/A
Thermal conductivity: 17.9 Wm
-1K
-1
Electrical conductivity: 2*10
6Ω
-1m
-1
Heat of fusion: N/A
Heat of vaporization: N/A
Electronegativity: 1.13 (Pauling's)